Jeon Suwan, Lee Su Eon, Kim Wonjoong, Lee Sun Hee, Min Seokhwan, Seon Seung Won, Han Seung Ho, Kim Bong Hoon, Lee Heon, Shin Jonghwa
Department of Materials Science and Engineering (DMSE), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea.
Department of Nano Mechanics, Korea Institute of Machinery and Materials (KIMM), Gajeongbuk-ro 156, Yuseong-gu, Daejeon 34103, Republic of Korea.
Nanophotonics. 2023 Jun 12;12(15):3199-3209. doi: 10.1515/nanoph-2023-0244. eCollection 2023 Jul.
Hiding terrestrial objects from aerial monitoring has long been an important objective in national security and public safety. However, the diversity of terrestrial environments raises great challenges to traditional camouflages optimized for a single spectral band or single type of background environment, rendering them vulnerable in other bands or backgrounds. Herein, we experimentally demonstrate simultaneous visual and thermal camouflage that can adapt to two different environments based on a thermally emissive electrochromic layer. We first explore diverse possible theoretical solutions for dual-band dual-environmental camouflage by solving analytic constraints for camouflage and steady-state thermal conditions and select the most viable approach. Based on the theoretical analysis, we design active camouflage thin-film material systems that can approximate two different target visible and infrared signatures of backgrounds under proper bias voltage. Our potentially flexible camouflage surfaces can also conceal heat sources such as human body as well with tailored designs. These results provide new directions in multi-band stealth designs.
长期以来，在国家安全和公共安全领域，将地面物体从空中监测中隐藏起来一直是一个重要目标。然而，地面环境的多样性给针对单一光谱波段或单一类型背景环境优化的传统伪装带来了巨大挑战，使其在其他波段或背景下易被识破。在此，我们通过实验展示了一种基于热发射电致变色层的、能适应两种不同环境的视觉和热伪装。我们首先通过解决伪装和稳态热条件的解析约束，探索了双波段双环境伪装的多种可能理论解决方案，并选择了最可行的方法。基于理论分析，我们设计了有源伪装薄膜材料系统，该系统在适当的偏置电压下可以模拟两种不同目标背景的可见光和红外特征。我们潜在的柔性伪装表面经过定制设计，还能隐藏诸如人体等热源。这些结果为多波段隐身设计提供了新方向。
